It's Not a Hybrid. It’s an Electric Vehicle with an Extended Driving Range
In practice, hybrid vehicles typically require both sources – engine and battery – to provide full vehicle performance capability. In a hybrid vehicle, the combustion engine is typically the larger of the two propulsion sources, and provides most of the power during high-power vehicle maneuvers like off-line starts and freeway cruising. A plug-in hybrid operates the same way, but can be recharged by being plugged in. Even with useful energy in the battery, the engine will often be operating to achieve vehicle peak loads.
Extended-Range Electric Vehicles like the Ampera and the Volt are unique from a hybrid or plug-in hybrid in that the vehicles’ wheels are always driven by an electric motor. The battery and propulsion systems are sized so the engine is never required for operation of the vehicle when energy is available from the battery. During this electric phase of driving, the battery, motor, and electronics are all designed to deliver full performance, acceleration, top speed, hill climbing ability, etc. on electric power alone.
Creating a new propulsion category: Extended-Range Electric Vehicle
Key Differences between Hybrid/E-REV/Fuel Cells